›› 2011, Vol. 32 ›› Issue (S1): 507-0514.

• Geotechnical Engineering • Previous Articles     Next Articles

Seismic response characteristics analysis of deep soft site under far-field ground motion of great earthquake

ZHAN Ji-yan1, CHEN Guo-xing1, LIU Jian-da2   

  1. 1. Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. Jiangsu Provincial Institute of Earthquake Engineering, Nanjing 210014, China
  • Received:2010-11-02 Online:2011-05-15 Published:2011-05-16

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Abstract: 采用等效线性方法考虑土的动力非线性特性，利用一维波动模型分析了深软场地的地震反应特性，结果表明，与输入苏州人工地震波时的计算结果相比，大地震远场地震动作用时，深软场地的地表水平向峰值加速度明显增大，规准反应谱的特征周期值显著增大，地表设计地震动的水平地震影响系数值明显增大，且两者的差异随输入地震动峰值加速度的增大而增大；当土层剪切波速的变异性由+10%变化到-10%时，地表水平地震影响系数曲线平台值有降低的趋势，规准反应谱的特征周期略有增大，且-10%的变异性对水平地震影响系数的影响要比+10%的变异性的影响显著；土体动剪切模量比和阻尼比均有变异时对地表设计地震动参数的影响较大，且土的阻尼比由-2δ到+2δ变异时，地表水平向峰值加速度和地震影响系数平台值有减小趋势

Key words: 深软场地, 大地震远场地震动, 土动力参数的变异性, 设计地震动参数

CLC Number: 

  • TU 435
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